Instructions / Assembly

Models
Model Peak Flow Rate Connection Size
OFPSYS 10 gpm (37.85 lpm) 1" NPT
Replacement Cartridge
OFPRFC Radial Flow Carbon Block Cartridge should be
replaced at least once every year
OFPSP Scale Prevention Cartridge should be replaced at
least once every 3 years
OFPCOM Combo Pack includes one carbon block cartridge
and one scale prevention cartridge
Feed Water Chemistry Requirements
WQA Certified to NSF/ANSI Standard 372
pH 6.5-8.5
Hardness (maximum) 30 grains (513 ppm CaCO3)*
Water Pressure 10 psi to 90 psi (0.69 bar to 6.2 bar)
Temperature 40° F to 100° F (5°C to 38°C)
Free Chlorine <2 ppm
Iron (maximum) 0.3 ppm**
Manganese (maximum) 0.05 ppm**
Copper 1.3 ppm***
Oil & H2S Must be Removed Prior to OneFlow
Total Phosphates < 3.0 ppm
Silica (maximum) 20 ppm †
TDS 1500 mg/l ††
System Specifications
Inlet/Outlet Connections: 1" MNPT (25 mm)
Nominal Flow Rate up to 10 gpm (37.85 lpm)
Capacity: OneFlow
®
+ system helps prevent scale in addition to
removing sediment, chlorine taste and odor. A replacement schedule
of once per year for the carbon cartridge and once per every 3 years
on the OneFlow
®
+ anti-scale cartridge is typical for residential sys-
tems. Frequency of cartridge replacement will depend on volume of
system usage.
Standards
Independent scientific testing has confirmed Template Assisted
Crystallization (TAC) technology provides scale reduction of over
90+%. Testing was conducted under protocol based on DVGW
W512 test to assess control of scale formation.
NOTICE
* Systems using OneFlow
®
technology are effective at con-
trolling lime-scale formation inside the plumbing system at
influent hardness levels up to 30 grains per gallon (513 ppm
CaCO3) of calcium carbonate. Due to variances in water
chemistry, 30 grains per gallon is a recommended hardness
maximum due to potential aesthetic issues related to soft
scale residue formation outside of the plumbing system.
Testing should be performed to determine proper application
where hardness levels exceed 30 grains per gallon.
** Just as with conventional water softening media, OneFlow
®
media needs to be protected from excess levels of certain
metals that can easily coat the active surface, reducing its
effectiveness over time. Public water supplies rarely, if ever,
present a problem, but if the water supply is from a private
well, confirm that the levels of iron (Fe) and manganese (Mn)
are less than 0.3 mg/L and 0.05 mg/L, respectively.
*** Pursuant to the EPA drinking water standards, the cop-
per concentration permitted is up to 1.3 ppm. Typically
originating from new copper plumbing, high levels of cop-
per can foul OneFlow media. New Copper lines need to
be passivated for a minimum of 4 weeks before placing
unit into service. For applications with copper concentra-
tion greater than 1.3 ppm, please consult Watts Water
Quality Technical Service. To further minimize any problem
with excess copper, avoid applying excessive flux on the
inner surfaces of the pipe and use a low-corrosivity water
soluble flux listed under the ASTM B813 standard.
NOTICE
† OneFlow
®
media does not reduce silica scaling. While silica
tends to have a less significant effect on scale formation than
other minerals, it can act as a binder that makes water spots
and scale residue outside the plumbing system difficult to
remove. This 20 ppm limitation is for aesthetic purposes.
†† All other contaminants must meet the requirements of the
USEPA Safe Drinking Water Act. Specific Mineral and Metal
MCL's, identified in Watts published Feed Water Chemistry
Requirements, supersedes the USEPA SDWA.
Water known to have heavy loads of dirt and debris may
require pre-filtration prior to OneFlow
®
.
WARNING
!